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A Novel Sporothrix Brasiliensis Genomic Variant in Midwestern Brazil

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A Novel Sporothrix Brasiliensis Genomic Variant in Midwestern Brazil medRxiv preprint doi: https://doi.org/10.1101/2020.07.09.20142125; this version posted July 11, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted medRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license . 1 A novel Sporothrix brasiliensis genomic variant in Midwestern Brazil: 2 evidence for an older and wider sporotrichosis outbreak 3 4 João Eudes Filhoa, Isabele Barbieri Santosb, Carmélia Matos Santiago Reisc, José Salvatori 5 Patanéd, Verenice Paredese, João Paulo Romualdoe, Sabrina Santos Costa Poggiannif, Talita de 6 Cássia Borges Castrof, Oscar Mauricio Gomezg, Sandro Antonio Pereirah, Edvar Yuri Pacheco 7 Schubachi, Kamila Peres Gomese, Heidi Mavengerej, Lucas Gomes de Brito Alvese, Joaquim 8 Lucasa, Hugo Costa Paese, Patricia Albuquerquel, Laurício Monteiro Cruzm, Juan G. McEweng, 9 Jason E. Stajichn, Rodrigo Almeida-Paesh, Rosely Maria Zancopé-Oliveirah, Daniel R. Matutej, 10 Bridget Barkero, Maria Sueli Soares Felipea,p, Marcus de Melo Teixeiraa,e,*, André Moraes 11 Nicola a,e,* 12 13 a Graduate Program in Genomic Sciences and Biotechnology, Catholic University of Brasília, 14 Brasília, Brazil. 15 b Oswaldo Cruz Institute – Oswaldo Cruz Foundation (Fiocruz), Rio de Janeiro, Brazil. 16 c University Hospital of Brasília, Brasília, Distrito Federal 17 d Laboratório Especial de Ciclo Celular, Butantan Institute, São Paulo, Brazil 18 e Faculty of Medicine, University of Brasília, Brazil 19 f Faculty of Agronomy and Veterinary Medicine, University of Brasília, Brasília, Brazil. 20 g Cellular & Molecular Biology Unit, Corporación para Investigaciones Biológicas, Medellín, 21 Colombia 22 h Evandro Chagas National Institute of Infectious Diseases, Oswaldo Cruz Foundation, Rio de 23 Janeiro, Brazil. 24 I Coordination of Public Health Laboratories, Ministry of Health, Brasília, Brazil. 25 j Department of Biology, University of North Carolina, Chapel Hill, US. 26 l Faculty of Ceilândia, University of Brasília, Brasília, Brazil. 27 m Office of Environmental Surveillance of Zoonoses, Federal District Health Secretariat, 28 Brasília, Brazil. NOTE: This preprint reports new research that has not been certified by peer review and should not be used to guide clinical practice. medRxiv preprint doi: https://doi.org/10.1101/2020.07.09.20142125; this version posted July 11, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted medRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license . 29 n Department of Microbiology & Plant Pathology and Institute for Integrative Genome Biology, 30 University of California, Riverside, Riverside, USA. 31 o Pathogen and Microbiome Institute, Northern Arizona University, Flagstaff, USA 32 p Institute of Biological Sciences, University of Brasília, Brasília, Brazil. 33 * These authors share senior authorship 34 35 Corresponding authors: 36 Name: André Moraes Nicola 37 Address: Campus Universitário Darcy Ribeiro, Núcleo de Medicina Tropical, sala 40. Brasília- 38 DF, Brazil. 70910-900. 39 Phone: +55 61 992619048 40 E-mail: [email protected] 41 42 Name: Marcus de Melo Teixeira 43 Address: Campus Universitário Darcy Ribeiro, Núcleo de Medicina Tropical, sala 40. Brasília- 44 DF, Brazil. 70910-900. 45 Phone: +55 61 993992827 46 E-mail: [email protected] 47 48 A novel Sporothrix brasiliensis genomic variant in Midwestern Brazil: 49 evidence for an older and wider sporotrichosis outbreak 50 51 Sporotrichosis is a subcutaneous infection caused by fungi from the genus Sporothrix. The 52 disease is transmitted by inoculation of infective particles found in plant-contaminated material 53 or diseased animals, characterizing the classic sapronotic and emerging zoonotic transmission, 54 respectively. Since 1998, Brazil has experienced a zoonotic sporotrichosis epidemic due to S. 55 brasiliensis, centered in the state of Rio de Janeiro. Our observation of feline sporotrichosis cases 56 in Brasília (Midwestern Brazil), around 900 km away from Rio de Janeiro, led us to question medRxiv preprint doi: https://doi.org/10.1101/2020.07.09.20142125; this version posted July 11, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted medRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license . 57 whether the epidemic caused by S. brasiliensis has spread from the epicenter in Rio de Janeiro, 58 emerged independently in the two locations, or whether the disease has been present and 59 unrecognized in Midwestern Brazil. A retrospective analysis of 91 human and 4 animal cases 60 from Brasília, ranging from 1993 to 2018, suggests the occurrence of both sapronotic and 61 zoonotic transmission. Molecular typing identified S. schenckii as the agent in two animals and 62 all seven human patients from which we were able to recover clinical isolates. However, in two 63 animals, the disease was caused by S. brasiliensis. Whole-genome sequence typing of seven S. 64 brasiliensis strains suggests that isolates from Brasília are genetically distinct from those 65 obtained at the epicenter of the outbreak in Rio de Janeiro, both in phylogenomic and population 66 genomic analyses. The two S. brasiliensis populations seem to have separated 2.24 - 3.09 million 67 years ago, indicating independent outbreaks or that the zoonotic S. brasiliensis outbreak might 68 have started earlier and be spread wider in South America than previously recognized. 69 70 Keywords: Sporothrix, Sporotrichosis, Sporothrix brasiliensis, Sporothrix schenckii, 71 Zoonotic transmission, Brasília. 72 73 Introduction 74 The emergence of fungal pathogens worldwide is an important and frequently neglected 75 public health issue [1]. One of the most frequent genera of pathogenic fungi is Sporothrix 76 (Sordariomycetes, Ascomycota), which causes the subcutaneous granulomatous disease called 77 sporotrichosis. [2,3]. The etiologic agent of the disease, S. schenckii sensu lato, was recently 78 described to harbor three cryptic species: S. schenckii sensu stricto, S. globosa, and the emerging 79 species S. brasiliensis [4-6]. The three species are saprophytes and produce sympodial and 80 sessile conidia that switch their morphology to the pathogenic yeast phase after a transcutaneous 81 injury [7]. The three species differ in their virulence. S. brasiliensis is more virulent in animal 82 models than S. schenckii and S. globosa, and causes localized to disseminated sporotrichosis that 83 can be fatal to both humans and cats [8]. Lower antifungal susceptibility and refractory medRxiv preprint doi: https://doi.org/10.1101/2020.07.09.20142125; this version posted July 11, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted medRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license . 84 sporotrichosis occurs in some Brazilian cases related to the zoonotic epidemics [9,10]. Previous 85 population genetics surveys revealed that S. brasiliensis is largely clonal and the little variation 86 in the species is associated to particular geographic areas [6]. On the other hand, its sister taxon 87 S. schenckii shows higher rates of recombination and little to no population structure among 88 Brazilian strains [6]. 89 Currently, sporotrichosis occurs endemically globally but it is especially prevalent in 90 Latin America, South Africa, Madagascar, China, India, and Japan [3]. In addition to endemic 91 disease, multiple sporotrichosis outbreaks have been reported in the last century [2,11,12]. 92 Before the 1990s, sporotrichosis was considered a disease of low-to-moderate endemicity in 93 Brazil. In the past two decades, though, it has become an urgent health problem [7,13]. In 1997, 94 three individuals from the same family got infected by Sporothrix sp. after successive feline 95 zoonotic transmission events in Rio de Janeiro, Brazil [14]. Since 1998, over 5,100 cats have 96 been diagnosed with sporotrichosis in the state of Rio de Janeiro; >5,000 human cases were 97 reported in 2015, suggesting high prevalence of the disease in the state [15]. Rio de Janeiro is 98 currently considered one of the three (along with China and South Africa) sporotrichosis 99 hyperendemic regions [14,16,17], with a crucial difference in incidence of feline sporotrichosis 100 and zoonotic transmission from cats to humans [6,18]. 101 Infections with S. brasiliensis have recently been described in Argentina and Paraguay, 102 the first reports of this species outside Brazil [19,20]. Sporotrichosis caused by S. brasiliensis has 103 recently been described in Northeast Brazil, also mostly due to zoonotic transmission [21-24]. 104 The recent emergence of S. brasiliensis-associated sporotrichosis in places with few or no cases 105 reported in the early 2000s raises the question of whether the outbreak has recently spread from 106 Rio de Janeiro or zoonotic sporotrichosis cases had been happening there, unrecognized. This 107 question is very important in determining public health policy do deal with emergent 108 sporotrichosis. In this work, prompted by our observation in 2015 of a case of sporotrichosis in a 109 cat whose owner also had a lesion that was suggestive of the disease, we address this question. 110 To look for evidence of human zoonotic infections, we documented additional animal 111 cases and retrospectively studied a series of sporotrichosis cases in the University Hospital of 112 Brasília. We also sequenced the genomes of seven Sporothrix spp. strains and compared them to 113 the reference S. brasiliensis 5110 genome [25]. We report for the first time the occurrence of S. 114 brasiliensis infections in animals at the capital of Brazil, Brasília, located in the Midwestern medRxiv preprint doi: https://doi.org/10.1101/2020.07.09.20142125; this version posted July 11, 2020.
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